src/egl/drivers/dri2/platform_x11.c

   1 /*
   2  * Copyright © 2011 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  16  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  18  * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
  19  * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  20  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  22  * DEALINGS IN THE SOFTWARE.
  23  *
  24  * Authors:
  25  *    Kristian Høgsberg <krh@bitplanet.net>
  26  */
  27
  28 #include <stdbool.h>
  29 #include <stdint.h>
  30 #include <stdlib.h>
  31 #include <string.h>
  32 #include <stdio.h>
  33 #include <limits.h>
  34 #include <dlfcn.h>
  35 #include <fcntl.h>
  36 #include <errno.h>
  37 #include <unistd.h>
  38 #ifdef HAVE_LIBDRM
  39 #include <xf86drm.h>
  40 #endif
  41 #include <sys/types.h>
  42 #include <sys/stat.h>
  43 #include "util/debug.h"
  44 #include "util/macros.h"
  45
  46 #include "egl_dri2.h"
  47 #include "egl_dri2_fallbacks.h"
  48 #include "loader.h"
  49
  50 #ifdef HAVE_DRI3
  51 #include "platform_x11_dri3.h"
  52 #endif
  53
  54 static EGLBoolean
  55 dri2_x11_swap_interval(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
  56                        EGLint interval);
  57
  58 uint32_t
  59 dri2_format_for_depth(struct dri2_egl_display *dri2_dpy, uint32_t depth);
  60
  61 static void
  62 swrastCreateDrawable(struct dri2_egl_display * dri2_dpy,
  63                      struct dri2_egl_surface * dri2_surf)
  64 {
  65    uint32_t           mask;
  66    const uint32_t     function = GXcopy;
  67    uint32_t           valgc[2];
  68
  69    /* create GC's */
  70    dri2_surf->gc = xcb_generate_id(dri2_dpy->conn);
  71    mask = XCB_GC_FUNCTION;
  72    xcb_create_gc(dri2_dpy->conn, dri2_surf->gc, dri2_surf->drawable, mask, &function);
  73
  74    dri2_surf->swapgc = xcb_generate_id(dri2_dpy->conn);
  75    mask = XCB_GC_FUNCTION | XCB_GC_GRAPHICS_EXPOSURES;
  76    valgc[0] = function;
  77    valgc[1] = False;
  78    xcb_create_gc(dri2_dpy->conn, dri2_surf->swapgc, dri2_surf->drawable, mask, valgc);
  79    switch (dri2_surf->depth) {
  80       case 32:
  81       case 30:
  82       case 24:
  83          dri2_surf->bytes_per_pixel = 4;
  84          break;
  85       case 16:
  86          dri2_surf->bytes_per_pixel = 2;
  87          break;
  88       case 8:
  89          dri2_surf->bytes_per_pixel = 1;
  90          break;
  91       case 0:
  92          dri2_surf->bytes_per_pixel = 0;
  93          break;
  94       default:
  95          _eglLog(_EGL_WARNING, "unsupported depth %d", dri2_surf->depth);
  96    }
  97 }
  98
  99 static void
 100 swrastDestroyDrawable(struct dri2_egl_display * dri2_dpy,
 101                       struct dri2_egl_surface * dri2_surf)
 102 {
 103    xcb_free_gc(dri2_dpy->conn, dri2_surf->gc);
 104    xcb_free_gc(dri2_dpy->conn, dri2_surf->swapgc);
 105 }
 106
 107 static bool
 108 x11_get_drawable_info(__DRIdrawable * draw,
 109                       int *x, int *y, int *w, int *h,
 110                       void *loaderPrivate)
 111 {
 112    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 113    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
 114
 115    xcb_get_geometry_cookie_t cookie;
 116    xcb_get_geometry_reply_t *reply;
 117    xcb_generic_error_t *error;
 118    bool ret;
 119
 120    cookie = xcb_get_geometry (dri2_dpy->conn, dri2_surf->drawable);
 121    reply = xcb_get_geometry_reply (dri2_dpy->conn, cookie, &error);
 122    if (reply == NULL)
 123       return false;
 124
 125    if (error != NULL) {
 126       ret = false;
 127       _eglLog(_EGL_WARNING, "error in xcb_get_geometry");
 128       free(error);
 129    } else {
 130       *x = reply->x;
 131       *y = reply->y;
 132       *w = reply->width;
 133       *h = reply->height;
 134       ret = true;
 135    }
 136    free(reply);
 137    return ret;
 138 }
 139
 140 static void
 141 swrastGetDrawableInfo(__DRIdrawable * draw,
 142                       int *x, int *y, int *w, int *h,
 143                       void *loaderPrivate)
 144 {
 145    *x = *y = *w = *h = 0;
 146    x11_get_drawable_info(draw, x, y, w, h, loaderPrivate);
 147 }
 148
 149 static void
 150 swrastPutImage(__DRIdrawable * draw, int op,
 151                int x, int y, int w, int h,
 152                char *data, void *loaderPrivate)
 153 {
 154    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 155    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
 156
 157    xcb_gcontext_t gc;
 158
 159    switch (op) {
 160    case __DRI_SWRAST_IMAGE_OP_DRAW:
 161       gc = dri2_surf->gc;
 162       break;
 163    case __DRI_SWRAST_IMAGE_OP_SWAP:
 164       gc = dri2_surf->swapgc;
 165       break;
 166    default:
 167       return;
 168    }
 169
 170    xcb_put_image(dri2_dpy->conn, XCB_IMAGE_FORMAT_Z_PIXMAP, dri2_surf->drawable,
 171                  gc, w, h, x, y, 0, dri2_surf->depth,
 172                  w*h*dri2_surf->bytes_per_pixel, (const uint8_t *)data);
 173 }
 174
 175 static void
 176 swrastGetImage(__DRIdrawable * read,
 177                int x, int y, int w, int h,
 178                char *data, void *loaderPrivate)
 179 {
 180    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 181    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
 182
 183    xcb_get_image_cookie_t cookie;
 184    xcb_get_image_reply_t *reply;
 185    xcb_generic_error_t *error;
 186
 187    cookie = xcb_get_image (dri2_dpy->conn, XCB_IMAGE_FORMAT_Z_PIXMAP,
 188                            dri2_surf->drawable, x, y, w, h, ~0);
 189    reply = xcb_get_image_reply (dri2_dpy->conn, cookie, &error);
 190    if (reply == NULL)
 191       return;
 192
 193    if (error != NULL) {
 194       _eglLog(_EGL_WARNING, "error in xcb_get_image");
 195       free(error);
 196    } else {
 197       uint32_t bytes = xcb_get_image_data_length(reply);
 198       uint8_t *idata = xcb_get_image_data(reply);
 199       memcpy(data, idata, bytes);
 200    }
 201    free(reply);
 202 }
 203
 204
 205 static xcb_screen_t *
 206 get_xcb_screen(xcb_screen_iterator_t iter, int screen)
 207 {
 208     for (; iter.rem; --screen, xcb_screen_next(&iter))
 209         if (screen == 0)
 210             return iter.data;
 211
 212     return NULL;
 213 }
 214
 215 static xcb_visualtype_t *
 216 get_xcb_visualtype_for_depth(struct dri2_egl_display *dri2_dpy, int depth)
 217 {
 218    xcb_visualtype_iterator_t visual_iter;
 219    xcb_screen_t *screen = dri2_dpy->screen;
 220    xcb_depth_iterator_t depth_iter = xcb_screen_allowed_depths_iterator(screen);
 221
 222    for (; depth_iter.rem; xcb_depth_next(&depth_iter)) {
 223       if (depth_iter.data->depth != depth)
 224          continue;
 225
 226       visual_iter = xcb_depth_visuals_iterator(depth_iter.data);
 227       if (visual_iter.rem)
 228          return visual_iter.data;
 229    }
 230
 231    return NULL;
 232 }
 233
 234 /* Get red channel mask for given depth. */
 235 unsigned int
 236 dri2_x11_get_red_mask_for_depth(struct dri2_egl_display *dri2_dpy, int depth)
 237 {
 238    xcb_visualtype_t *visual = get_xcb_visualtype_for_depth(dri2_dpy, depth);
 239
 240    if (visual)
 241       return visual->red_mask;
 242
 243    return 0;
 244 }
 245
 246 /**
 247  * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
 248  */
 249 static _EGLSurface *
 250 dri2_x11_create_surface(_EGLDriver *drv, _EGLDisplay *disp, EGLint type,
 251                         _EGLConfig *conf, void *native_surface,
 252                         const EGLint *attrib_list)
 253 {
 254    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 255    struct dri2_egl_config *dri2_conf = dri2_egl_config(conf);
 256    struct dri2_egl_surface *dri2_surf;
 257    xcb_get_geometry_cookie_t cookie;
 258    xcb_get_geometry_reply_t *reply;
 259    xcb_generic_error_t *error;
 260    const __DRIconfig *config;
 261
 262    (void) drv;
 263
 264    dri2_surf = malloc(sizeof *dri2_surf);
 265    if (!dri2_surf) {
 266       _eglError(EGL_BAD_ALLOC, "dri2_create_surface");
 267       return NULL;
 268    }
 269
 270    if (!dri2_init_surface(&dri2_surf->base, disp, type, conf, attrib_list, false))
 271       goto cleanup_surf;
 272
 273    dri2_surf->region = XCB_NONE;
 274    if (type == EGL_PBUFFER_BIT) {
 275       dri2_surf->drawable = xcb_generate_id(dri2_dpy->conn);
 276       xcb_create_pixmap(dri2_dpy->conn, conf->BufferSize,
 277                        dri2_surf->drawable, dri2_dpy->screen->root,
 278                         dri2_surf->base.Width, dri2_surf->base.Height);
 279    } else {
 280       STATIC_ASSERT(sizeof(uintptr_t) == sizeof(native_surface));
 281       dri2_surf->drawable = (uintptr_t) native_surface;
 282    }
 283
 284    config = dri2_get_dri_config(dri2_conf, type,
 285                                 dri2_surf->base.GLColorspace);
 286
 287    if (!config) {
 288       _eglError(EGL_BAD_MATCH, "Unsupported surfacetype/colorspace configuration");
 289       goto cleanup_pixmap;
 290    }
 291
 292    if (dri2_dpy->dri2) {
 293       dri2_surf->dri_drawable =
 294          dri2_dpy->dri2->createNewDrawable(dri2_dpy->dri_screen, config,
 295                                            dri2_surf);
 296    } else {
 297       assert(dri2_dpy->swrast);
 298       dri2_surf->dri_drawable =
 299          dri2_dpy->swrast->createNewDrawable(dri2_dpy->dri_screen, config,
 300                                              dri2_surf);
 301    }
 302
 303    if (dri2_surf->dri_drawable == NULL) {
 304       _eglError(EGL_BAD_ALLOC, "dri2->createNewDrawable");
 305       goto cleanup_pixmap;
 306    }
 307
 308    if (type != EGL_PBUFFER_BIT) {
 309       cookie = xcb_get_geometry (dri2_dpy->conn, dri2_surf->drawable);
 310       reply = xcb_get_geometry_reply (dri2_dpy->conn, cookie, &error);
 311       if (error != NULL) {
 312          if (error->error_code == BadAlloc)
 313             _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
 314          else if (type == EGL_WINDOW_BIT)
 315             _eglError(EGL_BAD_NATIVE_WINDOW, "xcb_get_geometry");
 316          else
 317             _eglError(EGL_BAD_NATIVE_PIXMAP, "xcb_get_geometry");
 318          free(error);
 319          goto cleanup_dri_drawable;
 320       } else if (reply == NULL) {
 321          _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
 322          goto cleanup_dri_drawable;
 323       }
 324
 325       dri2_surf->base.Width = reply->width;
 326       dri2_surf->base.Height = reply->height;
 327       dri2_surf->depth = reply->depth;
 328       free(reply);
 329    }
 330
 331    if (dri2_dpy->dri2) {
 332       xcb_void_cookie_t cookie;
 333       int conn_error;
 334
 335       cookie = xcb_dri2_create_drawable_checked(dri2_dpy->conn,
 336                                                 dri2_surf->drawable);
 337       error = xcb_request_check(dri2_dpy->conn, cookie);
 338       conn_error = xcb_connection_has_error(dri2_dpy->conn);
 339       if (conn_error || error != NULL) {
 340          if (type == EGL_PBUFFER_BIT || conn_error || error->error_code == BadAlloc)
 341             _eglError(EGL_BAD_ALLOC, "xcb_dri2_create_drawable_checked");
 342          else if (type == EGL_WINDOW_BIT)
 343             _eglError(EGL_BAD_NATIVE_WINDOW,
 344                       "xcb_dri2_create_drawable_checked");
 345          else
 346             _eglError(EGL_BAD_NATIVE_PIXMAP,
 347                       "xcb_dri2_create_drawable_checked");
 348          free(error);
 349          goto cleanup_dri_drawable;
 350       }
 351    } else {
 352       if (type == EGL_PBUFFER_BIT) {
 353          dri2_surf->depth = _eglGetConfigKey(conf, EGL_BUFFER_SIZE);
 354       }
 355       swrastCreateDrawable(dri2_dpy, dri2_surf);
 356    }
 357
 358    /* we always copy the back buffer to front */
 359    dri2_surf->base.PostSubBufferSupportedNV = EGL_TRUE;
 360
 361    return &dri2_surf->base;
 362
 363  cleanup_dri_drawable:
 364    dri2_dpy->core->destroyDrawable(dri2_surf->dri_drawable);
 365  cleanup_pixmap:
 366    if (type == EGL_PBUFFER_BIT)
 367       xcb_free_pixmap(dri2_dpy->conn, dri2_surf->drawable);
 368  cleanup_surf:
 369    free(dri2_surf);
 370
 371    return NULL;
 372 }
 373
 374 /**
 375  * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
 376  */
 377 static _EGLSurface *
 378 dri2_x11_create_window_surface(_EGLDriver *drv, _EGLDisplay *disp,
 379                                _EGLConfig *conf, void *native_window,
 380                                const EGLint *attrib_list)
 381 {
 382    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 383    _EGLSurface *surf;
 384
 385    surf = dri2_x11_create_surface(drv, disp, EGL_WINDOW_BIT, conf,
 386                                   native_window, attrib_list);
 387    if (surf != NULL) {
 388       /* When we first create the DRI2 drawable, its swap interval on the
 389        * server side is 1.
 390        */
 391       surf->SwapInterval = 1;
 392
 393       /* Override that with a driconf-set value. */
 394       dri2_x11_swap_interval(drv, disp, surf, dri2_dpy->default_swap_interval);
 395    }
 396
 397    return surf;
 398 }
 399
 400 static _EGLSurface *
 401 dri2_x11_create_pixmap_surface(_EGLDriver *drv, _EGLDisplay *disp,
 402                                _EGLConfig *conf, void *native_pixmap,
 403                                const EGLint *attrib_list)
 404 {
 405    return dri2_x11_create_surface(drv, disp, EGL_PIXMAP_BIT, conf,
 406                                   native_pixmap, attrib_list);
 407 }
 408
 409 static _EGLSurface *
 410 dri2_x11_create_pbuffer_surface(_EGLDriver *drv, _EGLDisplay *disp,
 411                                 _EGLConfig *conf, const EGLint *attrib_list)
 412 {
 413    return dri2_x11_create_surface(drv, disp, EGL_PBUFFER_BIT, conf,
 414                                   NULL, attrib_list);
 415 }
 416
 417 static EGLBoolean
 418 dri2_x11_destroy_surface(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf)
 419 {
 420    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 421    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 422
 423    (void) drv;
 424
 425    dri2_dpy->core->destroyDrawable(dri2_surf->dri_drawable);
 426
 427    if (dri2_dpy->dri2) {
 428       xcb_dri2_destroy_drawable (dri2_dpy->conn, dri2_surf->drawable);
 429    } else {
 430       assert(dri2_dpy->swrast);
 431       swrastDestroyDrawable(dri2_dpy, dri2_surf);
 432    }
 433
 434    if (surf->Type == EGL_PBUFFER_BIT)
 435       xcb_free_pixmap (dri2_dpy->conn, dri2_surf->drawable);
 436
 437    dri2_fini_surface(surf);
 438    free(surf);
 439
 440    return EGL_TRUE;
 441 }
 442
 443 /**
 444  * Function utilizes swrastGetDrawableInfo to get surface
 445  * geometry from x server and calls default query surface
 446  * implementation that returns the updated values.
 447  *
 448  * In case of errors we still return values that we currently
 449  * have.
 450  */
 451 static EGLBoolean
 452 dri2_query_surface(_EGLDriver *drv, _EGLDisplay *dpy,
 453                    _EGLSurface *surf, EGLint attribute,
 454                    EGLint *value)
 455 {
 456    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dpy);
 457    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 458    int x, y, w, h;
 459
 460    __DRIdrawable *drawable = dri2_dpy->vtbl->get_dri_drawable(surf);
 461
 462    switch (attribute) {
 463    case EGL_WIDTH:
 464    case EGL_HEIGHT:
 465       if (x11_get_drawable_info(drawable, &x, &y, &w, &h, dri2_surf)) {
 466          surf->Width = w;
 467          surf->Height = h;
 468       }
 469       break;
 470    default:
 471       break;
 472    }
 473    return _eglQuerySurface(drv, dpy, surf, attribute, value);
 474 }
 475
 476 /**
 477  * Process list of buffer received from the server
 478  *
 479  * Processes the list of buffers received in a reply from the server to either
 480  * \c DRI2GetBuffers or \c DRI2GetBuffersWithFormat.
 481  */
 482 static void
 483 dri2_x11_process_buffers(struct dri2_egl_surface *dri2_surf,
 484                          xcb_dri2_dri2_buffer_t *buffers, unsigned count)
 485 {
 486    struct dri2_egl_display *dri2_dpy =
 487       dri2_egl_display(dri2_surf->base.Resource.Display);
 488    xcb_rectangle_t rectangle;
 489
 490    dri2_surf->have_fake_front = false;
 491
 492    /* This assumes the DRI2 buffer attachment tokens matches the
 493     * __DRIbuffer tokens. */
 494    for (unsigned i = 0; i < count; i++) {
 495       dri2_surf->buffers[i].attachment = buffers[i].attachment;
 496       dri2_surf->buffers[i].name = buffers[i].name;
 497       dri2_surf->buffers[i].pitch = buffers[i].pitch;
 498       dri2_surf->buffers[i].cpp = buffers[i].cpp;
 499       dri2_surf->buffers[i].flags = buffers[i].flags;
 500
 501       /* We only use the DRI drivers single buffer configs.  This
 502        * means that if we try to render to a window, DRI2 will give us
 503        * the fake front buffer, which we'll use as a back buffer.
 504        * Note that EGL doesn't require that several clients rendering
 505        * to the same window must see the same aux buffers. */
 506       if (dri2_surf->buffers[i].attachment == __DRI_BUFFER_FAKE_FRONT_LEFT)
 507          dri2_surf->have_fake_front = true;
 508    }
 509
 510    if (dri2_surf->region != XCB_NONE)
 511       xcb_xfixes_destroy_region(dri2_dpy->conn, dri2_surf->region);
 512
 513    rectangle.x = 0;
 514    rectangle.y = 0;
 515    rectangle.width = dri2_surf->base.Width;
 516    rectangle.height = dri2_surf->base.Height;
 517    dri2_surf->region = xcb_generate_id(dri2_dpy->conn);
 518    xcb_xfixes_create_region(dri2_dpy->conn, dri2_surf->region, 1, &rectangle);
 519 }
 520
 521 static __DRIbuffer *
 522 dri2_x11_get_buffers(__DRIdrawable * driDrawable,
 523                      int *width, int *height,
 524                      unsigned int *attachments, int count,
 525                      int *out_count, void *loaderPrivate)
 526 {
 527    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 528    struct dri2_egl_display *dri2_dpy =
 529       dri2_egl_display(dri2_surf->base.Resource.Display);
 530    xcb_dri2_dri2_buffer_t *buffers;
 531    xcb_dri2_get_buffers_reply_t *reply;
 532    xcb_dri2_get_buffers_cookie_t cookie;
 533
 534    (void) driDrawable;
 535
 536    cookie = xcb_dri2_get_buffers_unchecked (dri2_dpy->conn,
 537                                             dri2_surf->drawable,
 538                                             count, count, attachments);
 539    reply = xcb_dri2_get_buffers_reply (dri2_dpy->conn, cookie, NULL);
 540    if (reply == NULL)
 541       return NULL;
 542    buffers = xcb_dri2_get_buffers_buffers (reply);
 543    if (buffers == NULL)
 544       return NULL;
 545
 546    *out_count = reply->count;
 547    dri2_surf->base.Width = *width = reply->width;
 548    dri2_surf->base.Height = *height = reply->height;
 549    dri2_x11_process_buffers(dri2_surf, buffers, *out_count);
 550
 551    free(reply);
 552
 553    return dri2_surf->buffers;
 554 }
 555
 556 static __DRIbuffer *
 557 dri2_x11_get_buffers_with_format(__DRIdrawable * driDrawable,
 558                                  int *width, int *height,
 559                                  unsigned int *attachments, int count,
 560                                  int *out_count, void *loaderPrivate)
 561 {
 562    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 563    struct dri2_egl_display *dri2_dpy =
 564       dri2_egl_display(dri2_surf->base.Resource.Display);
 565    xcb_dri2_dri2_buffer_t *buffers;
 566    xcb_dri2_get_buffers_with_format_reply_t *reply;
 567    xcb_dri2_get_buffers_with_format_cookie_t cookie;
 568    xcb_dri2_attach_format_t *format_attachments;
 569
 570    (void) driDrawable;
 571
 572    format_attachments = (xcb_dri2_attach_format_t *) attachments;
 573    cookie = xcb_dri2_get_buffers_with_format_unchecked (dri2_dpy->conn,
 574                                                         dri2_surf->drawable,
 575                                                         count, count,
 576                                                         format_attachments);
 577
 578    reply = xcb_dri2_get_buffers_with_format_reply (dri2_dpy->conn,
 579                                                    cookie, NULL);
 580    if (reply == NULL)
 581       return NULL;
 582
 583    buffers = xcb_dri2_get_buffers_with_format_buffers (reply);
 584    dri2_surf->base.Width = *width = reply->width;
 585    dri2_surf->base.Height = *height = reply->height;
 586    *out_count = reply->count;
 587    dri2_x11_process_buffers(dri2_surf, buffers, *out_count);
 588
 589    free(reply);
 590
 591    return dri2_surf->buffers;
 592 }
 593
 594 static void
 595 dri2_x11_flush_front_buffer(__DRIdrawable * driDrawable, void *loaderPrivate)
 596 {
 597    (void) driDrawable;
 598
 599    /* FIXME: Does EGL support front buffer rendering at all? */
 600
 601 #if 0
 602    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 603
 604    dri2WaitGL(dri2_surf);
 605 #else
 606    (void) loaderPrivate;
 607 #endif
 608 }
 609
 610 static int
 611 dri2_x11_do_authenticate(struct dri2_egl_display *dri2_dpy, uint32_t id)
 612 {
 613    xcb_dri2_authenticate_reply_t *authenticate;
 614    xcb_dri2_authenticate_cookie_t authenticate_cookie;
 615    int ret = 0;
 616
 617    authenticate_cookie =
 618       xcb_dri2_authenticate_unchecked(dri2_dpy->conn, dri2_dpy->screen->root, id);
 619    authenticate =
 620       xcb_dri2_authenticate_reply(dri2_dpy->conn, authenticate_cookie, NULL);
 621
 622    if (authenticate == NULL || !authenticate->authenticated)
 623       ret = -1;
 624
 625    free(authenticate);
 626
 627    return ret;
 628 }
 629
 630 static EGLBoolean
 631 dri2_x11_local_authenticate(struct dri2_egl_display *dri2_dpy)
 632 {
 633 #ifdef HAVE_LIBDRM
 634    drm_magic_t magic;
 635
 636    if (drmGetMagic(dri2_dpy->fd, &magic)) {
 637       _eglLog(_EGL_WARNING, "DRI2: failed to get drm magic");
 638       return EGL_FALSE;
 639    }
 640
 641    if (dri2_x11_do_authenticate(dri2_dpy, magic) < 0) {
 642       _eglLog(_EGL_WARNING, "DRI2: failed to authenticate");
 643       return EGL_FALSE;
 644    }
 645 #endif
 646    return EGL_TRUE;
 647 }
 648
 649 static EGLBoolean
 650 dri2_x11_connect(struct dri2_egl_display *dri2_dpy)
 651 {
 652    xcb_xfixes_query_version_reply_t *xfixes_query;
 653    xcb_xfixes_query_version_cookie_t xfixes_query_cookie;
 654    xcb_dri2_query_version_reply_t *dri2_query;
 655    xcb_dri2_query_version_cookie_t dri2_query_cookie;
 656    xcb_dri2_connect_reply_t *connect;
 657    xcb_dri2_connect_cookie_t connect_cookie;
 658    xcb_generic_error_t *error;
 659    char *driver_name, *loader_driver_name, *device_name;
 660    const xcb_query_extension_reply_t *extension;
 661
 662    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_xfixes_id);
 663    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_dri2_id);
 664
 665    extension = xcb_get_extension_data(dri2_dpy->conn, &xcb_xfixes_id);
 666    if (!(extension && extension->present))
 667       return EGL_FALSE;
 668
 669    extension = xcb_get_extension_data(dri2_dpy->conn, &xcb_dri2_id);
 670    if (!(extension && extension->present))
 671       return EGL_FALSE;
 672
 673    xfixes_query_cookie = xcb_xfixes_query_version(dri2_dpy->conn,
 674                                                   XCB_XFIXES_MAJOR_VERSION,
 675                                                   XCB_XFIXES_MINOR_VERSION);
 676
 677    dri2_query_cookie = xcb_dri2_query_version (dri2_dpy->conn,
 678                                                XCB_DRI2_MAJOR_VERSION,
 679                                                XCB_DRI2_MINOR_VERSION);
 680
 681    connect_cookie = xcb_dri2_connect_unchecked(dri2_dpy->conn, dri2_dpy->screen->root,
 682                                    XCB_DRI2_DRIVER_TYPE_DRI);
 683
 684    xfixes_query =
 685       xcb_xfixes_query_version_reply (dri2_dpy->conn,
 686                                       xfixes_query_cookie, &error);
 687    if (xfixes_query == NULL ||
 688        error != NULL || xfixes_query->major_version < 2) {
 689       _eglLog(_EGL_WARNING, "DRI2: failed to query xfixes version");
 690       free(error);
 691       free(xfixes_query);
 692       return EGL_FALSE;
 693    }
 694    free(xfixes_query);
 695
 696    dri2_query =
 697       xcb_dri2_query_version_reply (dri2_dpy->conn, dri2_query_cookie, &error);
 698    if (dri2_query == NULL || error != NULL) {
 699       _eglLog(_EGL_WARNING, "DRI2: failed to query version");
 700       free(error);
 701       return EGL_FALSE;
 702    }
 703    dri2_dpy->dri2_major = dri2_query->major_version;
 704    dri2_dpy->dri2_minor = dri2_query->minor_version;
 705    free(dri2_query);
 706
 707    connect = xcb_dri2_connect_reply (dri2_dpy->conn, connect_cookie, NULL);
 708    if (connect == NULL ||
 709        connect->driver_name_length + connect->device_name_length == 0) {
 710       _eglLog(_EGL_WARNING, "DRI2: failed to authenticate");
 711       return EGL_FALSE;
 712    }
 713
 714    device_name = xcb_dri2_connect_device_name (connect);
 715
 716    dri2_dpy->fd = loader_open_device(device_name);
 717    if (dri2_dpy->fd == -1) {
 718       _eglLog(_EGL_WARNING,
 719               "DRI2: could not open %s (%s)", device_name, strerror(errno));
 720       free(connect);
 721       return EGL_FALSE;
 722    }
 723
 724    if (!dri2_x11_local_authenticate(dri2_dpy)) {
 725       close(dri2_dpy->fd);
 726       free(connect);
 727       return EGL_FALSE;
 728    }
 729
 730    driver_name = xcb_dri2_connect_driver_name (connect);
 731
 732    /* If Mesa knows about the appropriate driver for this fd, then trust it.
 733     * Otherwise, default to the server's value.
 734     */
 735    loader_driver_name = loader_get_driver_for_fd(dri2_dpy->fd);
 736    if (loader_driver_name) {
 737       dri2_dpy->driver_name = loader_driver_name;
 738    } else {
 739       dri2_dpy->driver_name =
 740          strndup(driver_name,
 741                  xcb_dri2_connect_driver_name_length(connect));
 742    }
 743
 744    if (dri2_dpy->driver_name == NULL) {
 745       close(dri2_dpy->fd);
 746       free(connect);
 747       return EGL_FALSE;
 748    }
 749
 750 #ifdef HAVE_WAYLAND_PLATFORM
 751    dri2_dpy->device_name =
 752       strndup(device_name,
 753               xcb_dri2_connect_device_name_length(connect));
 754 #endif
 755
 756    free(connect);
 757
 758    return EGL_TRUE;
 759 }
 760
 761 static int
 762 dri2_x11_authenticate(_EGLDisplay *disp, uint32_t id)
 763 {
 764    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 765
 766    return dri2_x11_do_authenticate(dri2_dpy, id);
 767 }
 768
 769 static EGLBoolean
 770 dri2_x11_add_configs_for_visuals(struct dri2_egl_display *dri2_dpy,
 771                                  _EGLDisplay *disp, bool supports_preserved)
 772 {
 773    xcb_depth_iterator_t d;
 774    xcb_visualtype_t *visuals;
 775    int config_count = 0;
 776    EGLint surface_type;
 777
 778    d = xcb_screen_allowed_depths_iterator(dri2_dpy->screen);
 779
 780    surface_type =
 781       EGL_WINDOW_BIT |
 782       EGL_PIXMAP_BIT |
 783       EGL_PBUFFER_BIT;
 784
 785    if (supports_preserved)
 786       surface_type |= EGL_SWAP_BEHAVIOR_PRESERVED_BIT;
 787
 788    while (d.rem > 0) {
 789       EGLBoolean class_added[6] = { 0, };
 790
 791       visuals = xcb_depth_visuals(d.data);
 792
 793       for (int i = 0; i < xcb_depth_visuals_length(d.data); i++) {
 794          if (class_added[visuals[i]._class])
 795             continue;
 796
 797          class_added[visuals[i]._class] = EGL_TRUE;
 798
 799          for (int j = 0; dri2_dpy->driver_configs[j]; j++) {
 800             struct dri2_egl_config *dri2_conf;
 801             const __DRIconfig *config = dri2_dpy->driver_configs[j];
 802
 803             const EGLint config_attrs[] = {
 804                     EGL_NATIVE_VISUAL_ID,    visuals[i].visual_id,
 805                     EGL_NATIVE_VISUAL_TYPE,  visuals[i]._class,
 806                     EGL_NONE
 807             };
 808
 809             unsigned int rgba_masks[4] = {
 810                visuals[i].red_mask,
 811                visuals[i].green_mask,
 812                visuals[i].blue_mask,
 813                0,
 814             };
 815
 816             dri2_conf = dri2_add_config(disp, config, config_count + 1,
 817                                         surface_type, config_attrs,
 818                                         rgba_masks);
 819             if (dri2_conf)
 820                if (dri2_conf->base.ConfigID == config_count + 1)
 821                   config_count++;
 822
 823             /* Allow a 24-bit RGB visual to match a 32-bit RGBA EGLConfig.
 824              * Ditto for 30-bit RGB visuals to match a 32-bit RGBA EGLConfig.
 825              * Otherwise it will only match a 32-bit RGBA visual.  On a
 826              * composited window manager on X11, this will make all of the
 827              * EGLConfigs with destination alpha get blended by the
 828              * compositor.  This is probably not what the application
 829              * wants... especially on drivers that only have 32-bit RGBA
 830              * EGLConfigs! */
 831             if (d.data->depth == 24 || d.data->depth == 30) {
 832                rgba_masks[3] =
 833                   ~(rgba_masks[0] | rgba_masks[1] | rgba_masks[2]);
 834                dri2_conf = dri2_add_config(disp, config, config_count + 1,
 835                                            surface_type, config_attrs,
 836                                            rgba_masks);
 837                if (dri2_conf)
 838                   if (dri2_conf->base.ConfigID == config_count + 1)
 839                      config_count++;
 840             }
 841          }
 842       }
 843
 844       xcb_depth_next(&d);
 845    }
 846
 847    if (!config_count) {
 848       _eglLog(_EGL_WARNING, "DRI2: failed to create any config");
 849       return EGL_FALSE;
 850    }
 851
 852    return EGL_TRUE;
 853 }
 854
 855 static EGLBoolean
 856 dri2_copy_region(_EGLDriver *drv, _EGLDisplay *disp,
 857                  _EGLSurface *draw, xcb_xfixes_region_t region)
 858 {
 859    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 860    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 861    enum xcb_dri2_attachment_t render_attachment;
 862    xcb_dri2_copy_region_cookie_t cookie;
 863
 864    /* No-op for a pixmap or pbuffer surface */
 865    if (draw->Type == EGL_PIXMAP_BIT || draw->Type == EGL_PBUFFER_BIT)
 866       return EGL_TRUE;
 867
 868    dri2_dpy->flush->flush(dri2_surf->dri_drawable);
 869
 870    if (dri2_surf->have_fake_front)
 871       render_attachment = XCB_DRI2_ATTACHMENT_BUFFER_FAKE_FRONT_LEFT;
 872    else
 873       render_attachment = XCB_DRI2_ATTACHMENT_BUFFER_BACK_LEFT;
 874
 875    cookie = xcb_dri2_copy_region_unchecked(dri2_dpy->conn,
 876                                            dri2_surf->drawable,
 877                                            region,
 878                                            XCB_DRI2_ATTACHMENT_BUFFER_FRONT_LEFT,
 879                                            render_attachment);
 880    free(xcb_dri2_copy_region_reply(dri2_dpy->conn, cookie, NULL));
 881
 882    return EGL_TRUE;
 883 }
 884
 885 static int64_t
 886 dri2_x11_swap_buffers_msc(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw,
 887                           int64_t msc, int64_t divisor, int64_t remainder)
 888 {
 889    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 890    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 891    uint32_t msc_hi = msc >> 32;
 892    uint32_t msc_lo = msc & 0xffffffff;
 893    uint32_t divisor_hi = divisor >> 32;
 894    uint32_t divisor_lo = divisor & 0xffffffff;
 895    uint32_t remainder_hi = remainder >> 32;
 896    uint32_t remainder_lo = remainder & 0xffffffff;
 897    xcb_dri2_swap_buffers_cookie_t cookie;
 898    xcb_dri2_swap_buffers_reply_t *reply;
 899    int64_t swap_count = -1;
 900
 901    /* No-op for a pixmap or pbuffer surface */
 902    if (draw->Type == EGL_PIXMAP_BIT || draw->Type == EGL_PBUFFER_BIT)
 903       return 0;
 904
 905    if (draw->SwapBehavior == EGL_BUFFER_PRESERVED || !dri2_dpy->swap_available) {
 906       swap_count = dri2_copy_region(drv, disp, draw, dri2_surf->region) ? 0 : -1;
 907    } else {
 908       dri2_flush_drawable_for_swapbuffers(disp, draw);
 909
 910       cookie = xcb_dri2_swap_buffers_unchecked(dri2_dpy->conn,
 911                                                dri2_surf->drawable, msc_hi,
 912                                                msc_lo, divisor_hi, divisor_lo,
 913                                                remainder_hi, remainder_lo);
 914
 915       reply = xcb_dri2_swap_buffers_reply(dri2_dpy->conn, cookie, NULL);
 916
 917       if (reply) {
 918          swap_count = combine_u32_into_u64(reply->swap_hi, reply->swap_lo);
 919          free(reply);
 920       }
 921    }
 922
 923    /* Since we aren't watching for the server's invalidate events like we're
 924     * supposed to (due to XCB providing no mechanism for filtering the events
 925     * the way xlib does), and SwapBuffers is a common cause of invalidate
 926     * events, just shove one down to the driver, even though we haven't told
 927     * the driver that we're the kind of loader that provides reliable
 928     * invalidate events.  This causes the driver to request buffers again at
 929     * its next draw, so that we get the correct buffers if a pageflip
 930     * happened.  The driver should still be using the viewport hack to catch
 931     * window resizes.
 932     */
 933    if (dri2_dpy->flush->base.version >= 3 && dri2_dpy->flush->invalidate)
 934       dri2_dpy->flush->invalidate(dri2_surf->dri_drawable);
 935
 936    return swap_count;
 937 }
 938
 939 static EGLBoolean
 940 dri2_x11_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
 941 {
 942    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 943    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 944
 945    if (!dri2_dpy->flush) {
 946       dri2_dpy->core->swapBuffers(dri2_surf->dri_drawable);
 947       return EGL_TRUE;
 948    }
 949
 950    if (dri2_x11_swap_buffers_msc(drv, disp, draw, 0, 0, 0) == -1) {
 951       /* Swap failed with a window drawable. */
 952       return _eglError(EGL_BAD_NATIVE_WINDOW, __func__);
 953    }
 954    return EGL_TRUE;
 955 }
 956
 957 static EGLBoolean
 958 dri2_x11_swap_buffers_region(_EGLDriver *drv, _EGLDisplay *disp,
 959                              _EGLSurface *draw,
 960                              EGLint numRects, const EGLint *rects)
 961 {
 962    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 963    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 964    EGLBoolean ret;
 965    xcb_xfixes_region_t region;
 966    xcb_rectangle_t rectangles[16];
 967
 968    if (numRects > (int)ARRAY_SIZE(rectangles))
 969       return dri2_copy_region(drv, disp, draw, dri2_surf->region);
 970
 971    for (int i = 0; i < numRects; i++) {
 972       rectangles[i].x = rects[i * 4];
 973       rectangles[i].y = dri2_surf->base.Height - rects[i * 4 + 1] - rects[i * 4 + 3];
 974       rectangles[i].width = rects[i * 4 + 2];
 975       rectangles[i].height = rects[i * 4 + 3];
 976    }
 977
 978    region = xcb_generate_id(dri2_dpy->conn);
 979    xcb_xfixes_create_region(dri2_dpy->conn, region, numRects, rectangles);
 980    ret = dri2_copy_region(drv, disp, draw, region);
 981    xcb_xfixes_destroy_region(dri2_dpy->conn, region);
 982
 983    return ret;
 984 }
 985
 986 static EGLBoolean
 987 dri2_x11_post_sub_buffer(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw,
 988                      EGLint x, EGLint y, EGLint width, EGLint height)
 989 {
 990    const EGLint rect[4] = { x, y, width, height };
 991
 992    if (x < 0 || y < 0 || width < 0 || height < 0)
 993       _eglError(EGL_BAD_PARAMETER, "eglPostSubBufferNV");
 994
 995    return dri2_x11_swap_buffers_region(drv, disp, draw, 1, rect);
 996 }
 997
 998 static EGLBoolean
 999 dri2_x11_swap_interval(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
1000                        EGLint interval)
1001 {
1002    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
1003    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
1004
1005    if (dri2_dpy->swap_available)
1006       xcb_dri2_swap_interval(dri2_dpy->conn, dri2_surf->drawable, interval);
1007
1008    return EGL_TRUE;
1009 }
1010
1011 static EGLBoolean
1012 dri2_x11_copy_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
1013                       void *native_pixmap_target)
1014 {
1015    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
1016    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
1017    xcb_gcontext_t gc;
1018    xcb_pixmap_t target;
1019
1020    STATIC_ASSERT(sizeof(uintptr_t) == sizeof(native_pixmap_target));
1021    target = (uintptr_t) native_pixmap_target;
1022
1023    (void) drv;
1024
1025    dri2_dpy->flush->flush(dri2_surf->dri_drawable);
1026
1027    gc = xcb_generate_id(dri2_dpy->conn);
1028    xcb_create_gc(dri2_dpy->conn, gc, target, 0, NULL);
1029    xcb_copy_area(dri2_dpy->conn,
1030                   dri2_surf->drawable,
1031                   target,
1032                   gc,
1033                   0, 0,
1034                   0, 0,
1035                   dri2_surf->base.Width,
1036                   dri2_surf->base.Height);
1037    xcb_free_gc(dri2_dpy->conn, gc);
1038
1039    return EGL_TRUE;
1040 }
1041
1042 uint32_t
1043 dri2_format_for_depth(struct dri2_egl_display *dri2_dpy, uint32_t depth)
1044 {
1045    switch (depth) {
1046    case 16:
1047       return __DRI_IMAGE_FORMAT_RGB565;
1048    case 24:
1049       return __DRI_IMAGE_FORMAT_XRGB8888;
1050    case 30:
1051       /* Different preferred formats for different hw */
1052       if (dri2_x11_get_red_mask_for_depth(dri2_dpy, 30) == 0x3ff)
1053          return __DRI_IMAGE_FORMAT_XBGR2101010;
1054       else
1055          return __DRI_IMAGE_FORMAT_XRGB2101010;
1056    case 32:
1057       return __DRI_IMAGE_FORMAT_ARGB8888;
1058    default:
1059       return __DRI_IMAGE_FORMAT_NONE;
1060    }
1061 }
1062
1063 static _EGLImage *
1064 dri2_create_image_khr_pixmap(_EGLDisplay *disp, _EGLContext *ctx,
1065                              EGLClientBuffer buffer, const EGLint *attr_list)
1066 {
1067    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
1068    struct dri2_egl_image *dri2_img;
1069    unsigned int attachments[1];
1070    xcb_drawable_t drawable;
1071    xcb_dri2_get_buffers_cookie_t buffers_cookie;
1072    xcb_dri2_get_buffers_reply_t *buffers_reply;
1073    xcb_dri2_dri2_buffer_t *buffers;
1074    xcb_get_geometry_cookie_t geometry_cookie;
1075    xcb_get_geometry_reply_t *geometry_reply;
1076    xcb_generic_error_t *error;
1077    int stride, format;
1078
1079    (void) ctx;
1080
1081    drawable = (xcb_drawable_t) (uintptr_t) buffer;
1082    xcb_dri2_create_drawable (dri2_dpy->conn, drawable);
1083    attachments[0] = XCB_DRI2_ATTACHMENT_BUFFER_FRONT_LEFT;
1084    buffers_cookie =
1085       xcb_dri2_get_buffers_unchecked (dri2_dpy->conn,
1086                                       drawable, 1, 1, attachments);
1087    geometry_cookie = xcb_get_geometry (dri2_dpy->conn, drawable);
1088    buffers_reply = xcb_dri2_get_buffers_reply (dri2_dpy->conn,
1089                                                buffers_cookie, NULL);
1090    if (buffers_reply == NULL)
1091      return NULL;
1092
1093    buffers = xcb_dri2_get_buffers_buffers (buffers_reply);
1094    if (buffers == NULL) {
1095       return NULL;
1096    }
1097
1098    geometry_reply = xcb_get_geometry_reply (dri2_dpy->conn,
1099                                             geometry_cookie, &error);
1100    if (geometry_reply == NULL || error != NULL) {
1101       _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
1102       free(error);
1103       free(buffers_reply);
1104       return NULL;
1105    }
1106
1107    format = dri2_format_for_depth(dri2_dpy, geometry_reply->depth);
1108    if (format == __DRI_IMAGE_FORMAT_NONE) {
1109       _eglError(EGL_BAD_PARAMETER,
1110                 "dri2_create_image_khr: unsupported pixmap depth");
1111       free(buffers_reply);
1112       free(geometry_reply);
1113       return NULL;
1114    }
1115
1116    dri2_img = malloc(sizeof *dri2_img);
1117    if (!dri2_img) {
1118       free(buffers_reply);
1119       free(geometry_reply);
1120       _eglError(EGL_BAD_ALLOC, "dri2_create_image_khr");
1121       return EGL_NO_IMAGE_KHR;
1122    }
1123
1124    _eglInitImage(&dri2_img->base, disp);
1125
1126    stride = buffers[0].pitch / buffers[0].cpp;
1127    dri2_img->dri_image =
1128       dri2_dpy->image->createImageFromName(dri2_dpy->dri_screen,
1129                                            buffers_reply->width,
1130                                            buffers_reply->height,
1131                                            format,
1132                                            buffers[0].name,
1133                                            stride,
1134                                            dri2_img);
1135
1136    free(buffers_reply);
1137    free(geometry_reply);
1138
1139    return &dri2_img->base;
1140 }
1141
1142 static _EGLImage *
1143 dri2_x11_create_image_khr(_EGLDriver *drv, _EGLDisplay *disp,
1144                           _EGLContext *ctx, EGLenum target,
1145                           EGLClientBuffer buffer, const EGLint *attr_list)
1146 {
1147    (void) drv;
1148
1149    switch (target) {
1150    case EGL_NATIVE_PIXMAP_KHR:
1151       return dri2_create_image_khr_pixmap(disp, ctx, buffer, attr_list);
1152    default:
1153       return dri2_create_image_khr(drv, disp, ctx, target, buffer, attr_list);
1154    }
1155 }
1156
1157 static EGLBoolean
1158 dri2_x11_get_sync_values(_EGLDisplay *display, _EGLSurface *surface,
1159                          EGLuint64KHR *ust, EGLuint64KHR *msc,
1160                          EGLuint64KHR *sbc)
1161 {
1162    struct dri2_egl_display *dri2_dpy = dri2_egl_display(display);
1163    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surface);
1164    xcb_dri2_get_msc_cookie_t cookie;
1165    xcb_dri2_get_msc_reply_t *reply;
1166
1167    cookie = xcb_dri2_get_msc(dri2_dpy->conn, dri2_surf->drawable);
1168    reply = xcb_dri2_get_msc_reply(dri2_dpy->conn, cookie, NULL);
1169
1170    if (!reply)
1171       return _eglError(EGL_BAD_ACCESS, __func__);
1172
1173    *ust = ((EGLuint64KHR) reply->ust_hi << 32) | reply->ust_lo;
1174    *msc = ((EGLuint64KHR) reply->msc_hi << 32) | reply->msc_lo;
1175    *sbc = ((EGLuint64KHR) reply->sbc_hi << 32) | reply->sbc_lo;
1176    free(reply);
1177
1178    return EGL_TRUE;
1179 }
1180
1181 static const struct dri2_egl_display_vtbl dri2_x11_swrast_display_vtbl = {
1182    .authenticate = NULL,
1183    .create_window_surface = dri2_x11_create_window_surface,
1184    .create_pixmap_surface = dri2_x11_create_pixmap_surface,
1185    .create_pbuffer_surface = dri2_x11_create_pbuffer_surface,
1186    .destroy_surface = dri2_x11_destroy_surface,
1187    .create_image = dri2_create_image_khr,
1188    .swap_buffers = dri2_x11_swap_buffers,
1189    .set_damage_region = dri2_fallback_set_damage_region,
1190    .swap_buffers_region = dri2_fallback_swap_buffers_region,
1191    .post_sub_buffer = dri2_fallback_post_sub_buffer,
1192    /* XXX: should really implement this since X11 has pixmaps */
1193    .copy_buffers = dri2_fallback_copy_buffers,
1194    .query_buffer_age = dri2_fallback_query_buffer_age,
1195    .query_surface = dri2_query_surface,
1196    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
1197    .get_sync_values = dri2_fallback_get_sync_values,
1198    .get_dri_drawable = dri2_surface_get_dri_drawable,
1199 };
1200
1201 static const struct dri2_egl_display_vtbl dri2_x11_display_vtbl = {
1202    .authenticate = dri2_x11_authenticate,
1203    .create_window_surface = dri2_x11_create_window_surface,
1204    .create_pixmap_surface = dri2_x11_create_pixmap_surface,
1205    .create_pbuffer_surface = dri2_x11_create_pbuffer_surface,
1206    .destroy_surface = dri2_x11_destroy_surface,
1207    .create_image = dri2_x11_create_image_khr,
1208    .swap_interval = dri2_x11_swap_interval,
1209    .swap_buffers = dri2_x11_swap_buffers,
1210    .swap_buffers_with_damage = dri2_fallback_swap_buffers_with_damage,
1211    .swap_buffers_region = dri2_x11_swap_buffers_region,
1212    .set_damage_region = dri2_fallback_set_damage_region,
1213    .post_sub_buffer = dri2_x11_post_sub_buffer,
1214    .copy_buffers = dri2_x11_copy_buffers,
1215    .query_buffer_age = dri2_fallback_query_buffer_age,
1216    .query_surface = dri2_query_surface,
1217    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
1218    .get_sync_values = dri2_x11_get_sync_values,
1219    .get_dri_drawable = dri2_surface_get_dri_drawable,
1220 };
1221
1222 static const __DRIswrastLoaderExtension swrast_loader_extension = {
1223    .base = { __DRI_SWRAST_LOADER, 1 },
1224
1225    .getDrawableInfo = swrastGetDrawableInfo,
1226    .putImage        = swrastPutImage,
1227    .getImage        = swrastGetImage,
1228 };
1229
1230 static const __DRIextension *swrast_loader_extensions[] = {
1231    &swrast_loader_extension.base,
1232    &image_lookup_extension.base,
1233    NULL,
1234 };
1235
1236 static EGLBoolean
1237 dri2_get_xcb_connection(_EGLDriver *drv, _EGLDisplay *disp,
1238                         struct dri2_egl_display *dri2_dpy)
1239 {
1240    xcb_screen_iterator_t s;
1241    int screen = (uintptr_t)disp->Options.Platform;
1242    const char *msg;
1243
1244    disp->DriverData = (void *) dri2_dpy;
1245    if (disp->PlatformDisplay == NULL) {
1246       dri2_dpy->conn = xcb_connect(NULL, &screen);
1247       dri2_dpy->own_device = true;
1248    } else {
1249       Display *dpy = disp->PlatformDisplay;
1250
1251       dri2_dpy->conn = XGetXCBConnection(dpy);
1252       screen = DefaultScreen(dpy);
1253    }
1254
1255    if (!dri2_dpy->conn || xcb_connection_has_error(dri2_dpy->conn)) {
1256       msg = "xcb_connect failed";
1257       goto disconnect;
1258    }
1259
1260    s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
1261    dri2_dpy->screen = get_xcb_screen(s, screen);
1262    if (!dri2_dpy->screen) {
1263       msg = "failed to get xcb screen";
1264       goto disconnect;
1265    }
1266
1267    return EGL_TRUE;
1268 disconnect:
1269    if (disp->PlatformDisplay == NULL)
1270       xcb_disconnect(dri2_dpy->conn);
1271
1272    return _eglError(EGL_BAD_ALLOC, msg);
1273 }
1274
1275 static EGLBoolean
1276 dri2_initialize_x11_swrast(_EGLDriver *drv, _EGLDisplay *disp)
1277 {
1278    struct dri2_egl_display *dri2_dpy;
1279
1280    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1281    if (!dri2_dpy)
1282       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1283
1284    dri2_dpy->fd = -1;
1285    if (!dri2_get_xcb_connection(drv, disp, dri2_dpy))
1286       goto cleanup;
1287
1288    /*
1289     * Every hardware driver_name is set using strdup. Doing the same in
1290     * here will allow is to simply free the memory at dri2_terminate().
1291     */
1292    dri2_dpy->driver_name = strdup("swrast");
1293    if (!dri2_load_driver_swrast(disp))
1294       goto cleanup;
1295
1296    dri2_dpy->loader_extensions = swrast_loader_extensions;
1297
1298    if (!dri2_create_screen(disp))
1299       goto cleanup;
1300
1301    if (!dri2_setup_extensions(disp))
1302       goto cleanup;
1303
1304    dri2_setup_screen(disp);
1305
1306    if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp, true))
1307       goto cleanup;
1308
1309    /* Fill vtbl last to prevent accidentally calling virtual function during
1310     * initialization.
1311     */
1312    dri2_dpy->vtbl = &dri2_x11_swrast_display_vtbl;
1313
1314    return EGL_TRUE;
1315
1316  cleanup:
1317    dri2_display_destroy(disp);
1318    return EGL_FALSE;
1319 }
1320
1321 static void
1322 dri2_x11_setup_swap_interval(_EGLDisplay *disp)
1323 {
1324    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
1325    int arbitrary_max_interval = 1000;
1326
1327    /* default behavior for no SwapBuffers support: no vblank syncing
1328     * either.
1329     */
1330    dri2_dpy->min_swap_interval = 0;
1331    dri2_dpy->max_swap_interval = 0;
1332    dri2_dpy->default_swap_interval = 0;
1333
1334    if (!dri2_dpy->swap_available)
1335       return;
1336
1337    /* If we do have swapbuffers, then we can support pretty much any swap
1338     * interval.
1339     */
1340    dri2_setup_swap_interval(disp, arbitrary_max_interval);
1341 }
1342
1343 #ifdef HAVE_DRI3
1344
1345 static const __DRIextension *dri3_image_loader_extensions[] = {
1346    &dri3_image_loader_extension.base,
1347    &image_lookup_extension.base,
1348    &use_invalidate.base,
1349    &background_callable_extension.base,
1350    NULL,
1351 };
1352
1353 static EGLBoolean
1354 dri2_initialize_x11_dri3(_EGLDriver *drv, _EGLDisplay *disp)
1355 {
1356    struct dri2_egl_display *dri2_dpy;
1357
1358    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1359    if (!dri2_dpy)
1360       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1361
1362    dri2_dpy->fd = -1;
1363    if (!dri2_get_xcb_connection(drv, disp, dri2_dpy))
1364       goto cleanup;
1365
1366    if (!dri3_x11_connect(dri2_dpy))
1367       goto cleanup;
1368
1369    if (!dri2_load_driver_dri3(disp))
1370       goto cleanup;
1371
1372    dri2_dpy->loader_extensions = dri3_image_loader_extensions;
1373
1374    dri2_dpy->swap_available = true;
1375    dri2_dpy->invalidate_available = true;
1376
1377    if (!dri2_create_screen(disp))
1378       goto cleanup;
1379
1380    if (!dri2_setup_extensions(disp))
1381       goto cleanup;
1382
1383    dri2_setup_screen(disp);
1384
1385    dri2_x11_setup_swap_interval(disp);
1386
1387    if (!dri2_dpy->is_different_gpu)
1388       disp->Extensions.KHR_image_pixmap = EGL_TRUE;
1389    disp->Extensions.NOK_texture_from_pixmap = EGL_TRUE;
1390    disp->Extensions.CHROMIUM_sync_control = EGL_TRUE;
1391    disp->Extensions.EXT_buffer_age = EGL_TRUE;
1392
1393    dri2_set_WL_bind_wayland_display(drv, disp);
1394
1395    if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp, false))
1396       goto cleanup;
1397
1398    dri2_dpy->loader_dri3_ext.core = dri2_dpy->core;
1399    dri2_dpy->loader_dri3_ext.image_driver = dri2_dpy->image_driver;
1400    dri2_dpy->loader_dri3_ext.flush = dri2_dpy->flush;
1401    dri2_dpy->loader_dri3_ext.tex_buffer = dri2_dpy->tex_buffer;
1402    dri2_dpy->loader_dri3_ext.image = dri2_dpy->image;
1403    dri2_dpy->loader_dri3_ext.config = dri2_dpy->config;
1404
1405    /* Fill vtbl last to prevent accidentally calling virtual function during
1406     * initialization.
1407     */
1408    dri2_dpy->vtbl = &dri3_x11_display_vtbl;
1409
1410    _eglLog(_EGL_INFO, "Using DRI3");
1411
1412    return EGL_TRUE;
1413
1414  cleanup:
1415    dri2_display_destroy(disp);
1416    return EGL_FALSE;
1417 }
1418 #endif
1419
1420 static const __DRIdri2LoaderExtension dri2_loader_extension_old = {
1421    .base = { __DRI_DRI2_LOADER, 2 },
1422
1423    .getBuffers           = dri2_x11_get_buffers,
1424    .flushFrontBuffer     = dri2_x11_flush_front_buffer,
1425    .getBuffersWithFormat = NULL,
1426 };
1427
1428 static const __DRIdri2LoaderExtension dri2_loader_extension = {
1429    .base = { __DRI_DRI2_LOADER, 3 },
1430
1431    .getBuffers           = dri2_x11_get_buffers,
1432    .flushFrontBuffer     = dri2_x11_flush_front_buffer,
1433    .getBuffersWithFormat = dri2_x11_get_buffers_with_format,
1434 };
1435
1436 static const __DRIextension *dri2_loader_extensions_old[] = {
1437    &dri2_loader_extension_old.base,
1438    &image_lookup_extension.base,
1439    &background_callable_extension.base,
1440    NULL,
1441 };
1442
1443 static const __DRIextension *dri2_loader_extensions[] = {
1444    &dri2_loader_extension.base,
1445    &image_lookup_extension.base,
1446    &use_invalidate.base,
1447    &background_callable_extension.base,
1448    NULL,
1449 };
1450
1451 static EGLBoolean
1452 dri2_initialize_x11_dri2(_EGLDriver *drv, _EGLDisplay *disp)
1453 {
1454    struct dri2_egl_display *dri2_dpy;
1455
1456    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1457    if (!dri2_dpy)
1458       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1459
1460    dri2_dpy->fd = -1;
1461    if (!dri2_get_xcb_connection(drv, disp, dri2_dpy))
1462       goto cleanup;
1463
1464    if (!dri2_x11_connect(dri2_dpy))
1465       goto cleanup;
1466
1467    if (!dri2_load_driver(disp))
1468       goto cleanup;
1469
1470    if (dri2_dpy->dri2_minor >= 1)
1471       dri2_dpy->loader_extensions = dri2_loader_extensions;
1472    else
1473       dri2_dpy->loader_extensions = dri2_loader_extensions_old;
1474
1475    dri2_dpy->swap_available = (dri2_dpy->dri2_minor >= 2);
1476    dri2_dpy->invalidate_available = (dri2_dpy->dri2_minor >= 3);
1477
1478    if (!dri2_create_screen(disp))
1479       goto cleanup;
1480
1481    if (!dri2_setup_extensions(disp))
1482       goto cleanup;
1483
1484    dri2_setup_screen(disp);
1485
1486    dri2_x11_setup_swap_interval(disp);
1487
1488    disp->Extensions.KHR_image_pixmap = EGL_TRUE;
1489    disp->Extensions.NOK_swap_region = EGL_TRUE;
1490    disp->Extensions.NOK_texture_from_pixmap = EGL_TRUE;
1491    disp->Extensions.NV_post_sub_buffer = EGL_TRUE;
1492    disp->Extensions.CHROMIUM_sync_control = EGL_TRUE;
1493
1494    dri2_set_WL_bind_wayland_display(drv, disp);
1495
1496    if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp, true))
1497       goto cleanup;
1498
1499    /* Fill vtbl last to prevent accidentally calling virtual function during
1500     * initialization.
1501     */
1502    dri2_dpy->vtbl = &dri2_x11_display_vtbl;
1503
1504    _eglLog(_EGL_INFO, "Using DRI2");
1505
1506    return EGL_TRUE;
1507
1508  cleanup:
1509    dri2_display_destroy(disp);
1510    return EGL_FALSE;
1511 }
1512
1513 EGLBoolean
1514 dri2_initialize_x11(_EGLDriver *drv, _EGLDisplay *disp)
1515 {
1516    EGLBoolean initialized = EGL_FALSE;
1517
1518    if (!disp->Options.ForceSoftware) {
1519 #ifdef HAVE_DRI3
1520       if (!env_var_as_boolean("LIBGL_DRI3_DISABLE", false))
1521          initialized = dri2_initialize_x11_dri3(drv, disp);
1522 #endif
1523
1524       if (!initialized)
1525          initialized = dri2_initialize_x11_dri2(drv, disp);
1526    }
1527
1528    if (!initialized)
1529       initialized = dri2_initialize_x11_swrast(drv, disp);
1530
1531    return initialized;
1532 }
1533
1534 void
1535 dri2_teardown_x11(struct dri2_egl_display *dri2_dpy)
1536 {
1537    if (dri2_dpy->own_device)
1538       xcb_disconnect(dri2_dpy->conn);
1539 }